DSatz and guysonic did some measurements about this years ago. Basically, the mic input can handle ~ 2dBu and the line input can take ~ 24 dBu. If you are below 0 dBFS with the gain at 1 (line) or ~ 1.5 - 2 (mic), you won't brickwall. See these posts:

DSatz and guysonic did some measurements about this years ago. Basically, the mic input can handle ~ 2dBu and the line input can take ~ 24 dBu. If you are below 0 dBFS with the gain at 1 (line) or ~ 1.5 - 2 (mic), you won't brickwall. See these posts: